Sources and methodology

How the tools calculate

Shutter angle: time = (angle ÷ 360) × (1 ÷ fps). The blur in the preview is created by adding together the object’s positions while the shutter is open.
Frame rate: each monitor shows the frame a camera would have recorded at that instant (sample and hold). We estimate the display refresh rate from browser timing; it is an estimate.
Aspect ratio: letterbox / pillarbox = (1 − smaller ratio ÷ larger ratio) ÷ 2 on each side.
Storage calculator: bytes = Mb/s × 10⁶ × seconds ÷ 8. GB = 10⁹ B, TB = 10¹² B, GiB = 2³⁰ B. ProRes presets from Apple’s table, DNxHR from bytes per frame according to Avid. Audio and container overhead are not included.
Camera moves and shot sizes: illustrative models, not measurements; they show the principle.

An official YouTube loudness target in LUFS — YouTube doesn’t give one in its documentation, so neither do we.
The specific features and terms of commercial AI tools for generating and editing video — they change too quickly, so we describe categories, not products.